Huawei H12-821 Online Practice Questions and Exam Preparation

Huawei H12-821 Online Questions & Answers

• Question 181:

  On a WLAN, the HSB service sets up an HSB channel between two devices that back up each other, maintains the channel status, and backs up data. Which of the following can HSB back up in real time?

  A. CAPWAP tunnel information
  B. DHCP address information
  C. AP entries
  D. User data information
  A. CAPWAP tunnel information
  C. AP entries
  D. User data information

• Question 182:

  A large shopping mall configures a VLAN pool to prevent network performance deterioration caused by potentially large broadcast domains. A network engineer runs the display vlan pool name STA command to check information about the VLAN pool. The following command output is displayed:

  display vlan pool name STA Name : STA Total : 2 Assignment: hash Threshold Notify Count: 3 Threshold Notify time(min): 3 VLAN ID : 2 4 Which of the following statements are true?

  A. The VLANs with the IDs of 2 and 4 are added to the VLAN pool.
  B. The total number of VLAN pools is 2.
  C. The name of the VLAN pool is STA.
  D. The VLAN pool uses the even VLAN assignment algorithm.
  A. The VLANs with the IDs of 2 and 4 are added to the VLAN pool.
  C. The name of the VLAN pool is STA.

• Question 183:

  On a WLAN, engineers can use the VLAN pool mechanism to assign access users to different VLANs, which helps reduce the number of broadcast domains and improve network performance.

  VLAN pools support two VLAN assignment algorithms: even and hash. Drag the advantages and disadvantages to the two algorithms. (Token is reusable)

  A. Check the explanation
  B. Placeholder
  C. Placeholder
  D. Placeholder
  A. Check the explanation

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  Explanation

  Explanation of VLAN Pool Assignment Algorithms:

  In WLANs, VLAN pools help reduce broadcast domains and improve network performance by distributing users across multiple VLANs. Two algorithms are used for VLAN assignment:

  Even Assignment Algorithm:

  The number of users in each VLAN is even.

  This algorithm assigns users evenly across VLANs, ensuring a balanced distribution of users in each VLAN.

  When STAs go offline and online again, their VLANs and IP addresses may easily change.

  Since the assignment is based on maintaining even distribution, a device (STA) may not be assigned the same VLAN when it reconnects, leading to potential IP address changes.

  Hash Assignment Algorithm:

  The number of users in each VLAN is uneven.

  The hash algorithm assigns users to VLANs based on a hash value (e.g., derived from the MAC address). This may result in an uneven distribution of users across VLANs.

  VLANs and IP addresses remain unchanged for STAs that go offline and online again.

  The hash algorithm ensures that a device reconnects to the same VLAN, preserving its IP address.

• Question 184:

  During routine maintenance, an enterprise administrator runs a command to check VRRP group information. Which of the following statements is false about the command output? display vrrp verbose Vlanif100 | Virtual Router 1 State: Master

  Virtual IP: 10.1.1.100 Master IP: 10.1.1.2 PriorityRun: 120 PriorityConfig: 120

  DR: None BDR: None MTU: 0 Preempt: YES Delay Time: 20s Remain: -Track: YES Priority Reduced: 20 Auth Type: MD5 BFD-session State: UP

  A. Preemption is enabled for the VRRP group.
  B. This VRRP group is an mVRRP group.
  C. Authentication is enabled for the VRRP group.
  D. The ID of the VRRP group is 1.
  B. This VRRP group is an mVRRP group.

• Question 185:

  On an OSPF network, an IR in area 0 must be a BR, but an ASBR may not be an ABR.

  A. TRUE
  B. FALSE
  B. FALSE

• Question 186:

  IP multicast effectively conserves network bandwidth and reduces network load. Therefore, it is widely used in network services, such as IPTV, real-time data transmission, and multimedia conferencing.

  A. TRUE
  B. FALSE
  A. TRUE

• Question 187:

  Which of the following statements is false about the default processing of the next hop address when a BGP device advertises a route?

  A. When advertising a locally originated route to an IBGP peer, a BGP device sets the next hop address to the IP address of its interface connected to the peer.
  B. When advertising a non-labeled route received from an EBGP peer to an IBGP peer, a BGP device changes the next hop address to the IP address of its interface connected to the IBGP peer.
  C. When advertising a route to an EBGP peer, a BGP device sets the next hop address to the IP address of its interface connected to the peer.
  D. A BGP device does not change the next hop address of a route if the route is received from an IBGP peer and is to be sent to another IBGP peer.
  B. When advertising a non-labeled route received from an EBGP peer to an IBGP peer, a BGP device changes the next hop address to the IP address of its interface connected to the IBGP peer.

• Question 188:

  Which of the following statements regarding the summary automatic command and BGP route summarization is false?

  A. After this command is configured, BGP sends only the summarized routes to peers
  B. This command is used to implement automatic summarization. Automatic summarization takes precedence over manual summarization
  C. This command enables automatic summarization for the locally imported routes
  D. After this command is configured, BGP summarizes routes based on natural network segments
  B. This command is used to implement automatic summarization. Automatic summarization takes precedence over manual summarization

• Question 189:

  A local router runs IS-IS and its command output is shown in the following figure. Which of the following statements is true?

  

  A. The circuit level of S4/0/0 is Level-1.
  B. S4/0/0 supports IPv6.
  C. S4/0/0 sends IIH packets at the interval of 30s.
  D. The cost of S4/0/0 is 20.
  D. The cost of S4/0/0 is 20.

• Question 190:

  The BFD Echo function checks the connectivity of the forwarding link by looping back packets. Which of the following statements are true about this function?

  A. If URPF is enabled on the peer end, BFD packets may be incorrectly discarded on the peer end.
  B. In the BFD Echo function, the device uses the IP address of the outbound interface as the source IP address by default.
  C. The BFD Echo function applies only to single-hop BFD sessions.
  D. When configuring a BFD session supporting the BFD echo function, you need to configure both the local and remote discriminators.
  A. If URPF is enabled on the peer end, BFD packets may be incorrectly discarded on the peer end.
  B. In the BFD Echo function, the device uses the IP address of the outbound interface as the source IP address by default.